We at Loc.1152 needed a way to prevent pests like fly’s and other small flying insects from entering the establishment. One day a regular guest by the name of Mr. Peter Gordon told us about a unit that could possibly eliminate our pest concerns once and for all. When we tested the unit our pest concern was totally eliminated. This unit prevented any flying insect from penetrating through our back door. We would proudly recommend this kind of unity at any location that has this pest concern. I purchased a second unit for our 1154 Loc. in Edmonton